Project Instructions

User Manual:

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5/11/2018 https://docs.google.com/document/d/1-OkpZLjG_kX9J6LIQ5IltsqMzVWjh36QpnP2RYpVdPU/pub?embedded=True
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Statistics: The Science of Decisions
ProjectInstructions
Background Information
InaStrooptask,participantsarepresentedwithalistofwords,witheachword
displayedinacolorofink.Theparticipant’staskistosayoutloudthecolorofthe
inkinwhichthewordisprinted.Thetaskhastwoconditions:acongruentwords
condition,andanincongruentwordscondition.Inthecongruentwordscondition,
thewordsbeingdisplayedarecolorwordswhosenamesmatchthecolorsin
whichtheyareprinted:forexampleRED,BLUE.Intheincongruentwordscondition,
thewordsdisplayedarecolorwordswhosenamesdonotmatchthecolorsin
whichtheyareprinted:forexamplePURPLE,ORANGE.Ineachcase,wemeasure
thetimeittakestonametheinkcolorsinequallysizedlists.Eachparticipantwill
gothroughandrecordatimefromeachcondition.
Questions For Investigation
Asageneralnote,besuretokeeparecordofanyresourcesthatyouuseorrefer
tointhecreationofyourproject.Youwillneedtoreportyoursourcesaspartof
theprojectsubmission.
1.Whatisourindependentvariable?Whatisourdependentvariable?
2.Whatisanappropriatesetofhypothesesforthistask?Whatkindofstatistical
testdoyouexpecttoperform?Justifyyourchoices.
Nowit’syourchancetotryouttheStrooptaskforyourself.Gotothislink,which
hasaJavabasedappletforperformingtheStrooptask.Recordthetimesthatyou
receivedonthetask(youdonotneedtosubmityourtimestothesite.)Now,
downloadthisdatasetwhichcontainsresultsfromanumberofparticipantsinthe
task.Eachrowofthedatasetcontainstheperformanceforoneparticipant,with
thefirstnumbertheirresultsonthecongruenttaskandthesecondnumbertheir
performanceontheincongruenttask.
3.Reportsomedescriptivestatisticsregardingthisdataset.Includeatleastone
measureofcentraltendencyandatleastonemeasureofvariability.
4.Provideoneortwovisualizationsthatshowthedistributionofthesampledata.
Writeoneortwosentencesnotingwhatyouobserveabouttheplotorplots.
5.Now,performthestatisticaltestandreportyourresults.Whatisyour
confidencelevelandyourcriticalstatisticvalue?Doyourejectthenullhypothesis
orfailtorejectit?Cometoaconclusionintermsoftheexperimenttask.Didthe
resultsmatchupwithyourexpectations?
5/11/2018 https://docs.google.com/document/d/1-OkpZLjG_kX9J6LIQ5IltsqMzVWjh36QpnP2RYpVdPU/pub?embedded=True
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6.Optional:Whatdoyouthinkisresponsiblefortheeffectsobserved?Canyou
thinkofanalternativeorsimilartaskthatwouldresultinasimilareffect?Some
researchabouttheproblemwillbehelpfulforthinkingaboutthesetwoquestions!

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